Electric circuit and motor.



H. M. SHEDD. BLECTRIG CIRCUIT AND MQTOB.

Anmoumx funn 11110.24, 1912.

1,103,698, Patented July 14,1914

:menue ringtonen A To llfwhom itmoy concern Be itl known-"the y1,.HARRY-It,- Summe citizen of the United Stts'nlnd aresident' of Rosel1e,county.of Union, and 'State'.of NewJersey,- have invented a new and use-l ful Improvement in Electric Circuits-end.

Motors, of which the following is ailspecication.

The-object ofmy invention is to place. a

motor in n. circuit ,whichrnayvbe supplied with a direct or alternating'cnrrennand etrnl at approximatelythe semefepeedlun. et-

the -same conditions. of load. This m'eenl .that it will# run at a constant speed even.

thou h the.current muy be-chenged'roml one orm to the,other, a s from alternating to direct, and that. this, chungexnay made without in anywayinterferxng with the opf4 eration of 'the motor or givin' litany attention whatsoever onthepart o thev attendant'. Ill-other words, the object ofi-my 'invention `is to provide a uniform Speed motor which automatically adjusts ,itS'elf tolchanges in the kind of current which occnr'dur'ng its time of service. This and other 4objeetf.; vare ac' complished bym. invention, oneembodil ment of which is liereinafter set forth'.

For a more particular. description, reference is to be lind ..to the accom anying drawing, which d iagrummatially il ustrates one form .ofstructure fiori; cerryingv out my invention.

l indicates a series 'motor which is l foi` either an alternating or a vdircctcilrrent, and' is provided with, iin .armature 2. and' fieldmagnets 3 und which .u re`in series withthe e armature .2.' This motor is supplied byelec' tricity from the 'feed wire or usbars 'nnd 6 which are sllpplied'-n'itli' {anyiiltferns'itingr orl direct current.necording to tlie'eonditiohs of service. 'Thewire-5 is"conn'ted'fto'fhe field magnet 3 liy-a suitable eoniiuctor 7,

and the field magnet ft vis*connected to the i to said secondary winding and adapted 'to wire (i through a conductor-.18. The nhove describedapparatus ls Quilicient to run the motor 1 when n dn'ect c urrent iasupplierl` but the ippiaratrisfiS` not its sufficient to run the xnotoratnniforrn speed when an alternating 4 eur ren t. i s'` furnighedl 'lo provide for thedifferenecs between a di reet and an .alternating current one of .the field magnets, mythe field magnet 3, is pro- -virlell with a semndar winding 9 which is connected with suitah e conductors with un electroumgnet 10 so that Athe, magnets 10 and spumanti f im@ new. mmm einem mit wel E@ negen.-

v Qlale'alweys in series. one

"' duce u. corresponding-.current in the wind Patented Juiy Milou."

.With-the. Other- The core 1l of-:the magnet 10 hasan arme# 'ture 12 which is normally kept away'. from',V this core, by a. suitable Spring 13, the armnture and spring beingmountedfn the usua-tmanner. The armature 12-is alsucnnectai by a link 14 vto a switch 15,.w.hich may; nit'ei either of two conductors l'andS, within-- :wire 17. The wire. 8 runs t othe end-"of .the

, winding 4 so that a part ffthla ldzlliagnetg--. 4 is out out when-the switch 15 is-ciosed; alternating current in the magnetllwill-n ing 9,:andth1s'yviil' canse the"magnet;` 7'0- become lenergized and -tlnerebyv draw' .the armature 12 and cause it toi-.closetheewitch--. 15 through the-'linke 1 4 andthereliyf-huntfthe. entrent through the conductme'y l-sa l 17 and thereby cat out a part-.of ythe ing 4, so that o uniformv speed of thegrmm'," o ture is maintained although the application". Aof current is varied. y

- While Iv have shownone 'embodiment vof 4my invention, it will be seen,tha t it nl y ybe Q embodied iii-other wavs, ali Aor'ii'iiioli;come within the scope of the annexed claims;

1. In a system of the class described, a series electric motor with a rimary wind ing connected t-o a source oi) electrical emergy, a seconda-ry winding operatively conil n'ectedwith said motor, el magnet connected with saidsecondary winding andndapted tc be energized thereby-when a' current iS .induced in s aid secondarywi-nding,-f-.an fnl-mature for the magnet, nnd-4 means-conf nected with the-armature for." va-rying' the :electrical resistance of saidinotoiz.

2. In a systemoiy the class described, a '-95 motor connected to remmen of lelectrical energy, a secondary 'windingon the field magnet of said motor, a magnet connected heenergized thereby uhen'an alternating 100 .current passes through the motor, n n armature for the muguet, unil means connected with the armature for varying the reistunce of the moton. i

pair of' lmslmrs. n series motor, enmluctors connecting said cries motor und hns-liars so that said motor may berlin when n direct current is applied', secondary winding on a .Y magnet 44 and the-wire .1c-wa point-.11e iii-nient 2l. ln u. s item of the class described, n 10 5 field magnet of said motor, a magnet conlnected 1n series with said secondary winding, an armature for said magnet, a switch connected to seid armature, and a circuit adapted to oe closed by said switch` for shunting out a section of the motor winding.

4. The combination with en electric Inctor with` a icld magnet winding of a secondary winding in inductive relation to this field magnet winding of said nl... er and means operated oy current flow in said secondary winding for varying the effective resistance of the field magnet windings of the motor.

5.. The combination withan elect-ric'V motor having n. ticld magnet winding, a'sec-U oudary winding in inductive relation to this winding of said motor and means operated throughv said secondary winding when an alternating current flows through said motor to automatically shunt out a portion of the motor winding.

"6; Wires ladapted gto receive either an all' ternating current or a direct current, an electric motor of the direct current type with-'an armature and field magnet windings connected inse'ries with said wires, a secondary `winding in inductive relation to one of the motor windings and means connected to said secondary winding' for automatically varying theresistance of said motor by ,a current change from an alternating Vto a direct or a'direct to an alternating. f ,Zi'The combination withY a series'electric motor providedi with a eldmagnet forming the primary winding'of a transformer, of a secondary windin of this transformer connected to e. means Eror automatically var ing the resistance of the motor, when a. change is made in the source of supply to the motor from direct to alternating current, .or vice versa.

8. The combination with an electric motor having a primary windin of a secondary winding in inductive re tion to the primary winding of Asaid motor, and means connected to said secondary winding operated when e change is made 1n the source of supply from alternating to direct current or vice versa to automatically change the resistance of the said motor.

9. In a system of the class described, a motor with'a lfield magnet havin adapted to-be'cut in or out w ereby the ampere turns of theiield magnet may be varied, `and automatic means connected with such iield Ymagnet for cutting in or out these windings when the current 1n the motor changes yfrom direct to alternating, or vice versa.

Signed at New York, in the county of New York, and v'State ofv New York, this 23rd day of December, 1912.

HARRY M. SHE'DD Witnesses Gvamvn I. ARoNow, H. ,-Ranzmsxr.

windings 

